Fuel System

Question 1

Using the cross flow valve, how is a fuel balance problem corrected?

Answer 1

By opening the cross flow valve and turning off the fuel pumps on the light wing

Question 2

When must fuel balancing be done using the inter tank valve?

Answer 2

When the tank temp is less than 0°C

Question 3

What is the maximum fuel imbalance

Answer 3

1000lbs for take off

2000lbs in flight and refueling

Question 4

What are the correct indications during fuel quantity indicator test?

Answer 4

Left- 7000LBS
Right 7000LBS
Total 14000LBS

And an amber L-R FUEL LEVEL LOW CAS message

Question 5

Where is the fuel hooper located?

Answer 5

Inboard Portion of each wing tank

Question 6

How much fuel is in the hopper?

Answer 6

190 US gallons or approximately 1283 LBS

Question 7

How much fuel is remaining in the hopper when the amber LR FUEL LEVEL LOW CAS message appears?

Answer 7

Approximately 650 LBS

Question 8

What is the function of the pressure fueling static port located under each wing?

Answer 8

It provides a reference pressure to prevent over pressurization of the wing during fueling operations

Question 9

How are the main fuel shutoff valves checked during preflight walk around?

Answer 9

Verify that the valves are open by physically checking that the red valve position indicator is approximately the 7 o clock position

Question 10

What is the maximum standard fuel load?

Can that ever be exceeded?

Answer 10

41300 LBS, however, more fuel can be added so long as the max ramp weights are not exceeded

Question 11

If a main fuel boost pump should fail, will the alternate fuel boost pump automatically come on, if selected off?

Answer 11

No, there is no auto change feature

Question 12

Which part of the fuel system will be available when powering the aircraft with the HMG only?

Answer 12

Left and right main boost pumps, cross flow and inter tank valve

Question 13

If the RED light on the refueling door illuminates during refueling, what does this mean and what should be done?

Answer 13

The fuel has reached the plenum and you should shut off fueling

Question 14

The engines could run without the boost pump pressure up to what maximum altitude?

Answer 14

Less than 20000ft

Question 15

With the heated fuel return system (HFRS) switch selected to AUTO, when does the system automatically turn on?

Answer 15

When either tank temperature decreases to 0°C or below

Question 16

Usable fuel capacity

Answer 16

41300 LBS

Question 17

What is the power source for the automatic refueling system (ground service control panel)?

Answer 17

The ground service bus

Question 18

Fuel low level warnings are provided by low level sensors, which are installed where in the wing?

Answer 18

In each fuel hopper tank

Question 19

Where are the electrically driven fuel boost pumps located?

Answer 19

On the forward wall of each wheel well

Question 20

What are the electrical sources of the fuel boost pumps?

Answer 20

L and R Main boost pumps: L and R ESS DC BUS

L and R ALT boost pumps: L and R MAIN DC BUS

Question 21

If an engine fire handle is pulled, where does the fuel shut off?

Answer 21

At the respective main fuel feed shutoff valve in the main wheel well

Question 22

If an amber L or R FUEL LEVEL LOW CAS message appears with more than 650 lbs of fuel remaining in the respective wing, what should be done?

Answer 22

Descend without delay to a warmer altitude at a minimum speed of 0.80 M

Question 23

When and how are fuel quantity updates performed?

Answer 23

Hourly, using data from the FQMS.

On FMS PERF INIT page 5/5, perform a “DELETE” to line select key 2L.